My family loves these chewy bars so much that a pan of them does not last very long in our home. They are from a Kitchenaid cookbook entitled "Great Baking and More." These yummy bars are so quick and easy to stir up and are great for dessert, snacks or lunch boxes. I have used pecans in place of the walnuts and M&Ms for the chocolate chips successfully. Feel free to add your favorite ingredients to this buttery base - it's a winner!